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Related Concept Videos

Inborn Errors of Metabolism01:20

Inborn Errors of Metabolism

Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
Overview of Protein Metabolism01:21

Overview of Protein Metabolism

Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted.
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
Pharmacokinetics in Pediatric Patients: Drug Metabolism01:24

Pharmacokinetics in Pediatric Patients: Drug Metabolism

In pediatric care, understanding the nuances of hepatic drug metabolism is crucial, as it significantly differs from that of adults. This divergence is primarily due to the developmental stage of drug-metabolizing enzymes, which affects how medications are processed in the body. In neonates, for instance, the activity of Phase I enzymes—critical for the initial breakdown of drugs—is markedly reduced, functioning at just 20–40% of the levels seen in adults. This reduction poses a challenge in...
Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
Pharmacogenetics of Phase II Enzymes: N-acetyltransferase, Thiopurine S-methyltransferase, UDP-glucuronosyltransferase01:27

Pharmacogenetics of Phase II Enzymes: N-acetyltransferase, Thiopurine S-methyltransferase, UDP-glucuronosyltransferase

Phase II biotransformation reactions are essential for detoxifying and eliminating xenobiotics, including many pharmaceutical compounds. These reactions typically involve conjugation, the covalent attachment of polar endogenous groups such as glucuronic acid, sulfate, methyl, or acetyl moieties to functional groups introduced during Phase I metabolism. The resulting conjugates are more water-soluble, enabling efficient renal or biliary excretion.The major classes of Phase II enzymes include...
Lethal Alleles02:41

Lethal Alleles

Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...

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Related Experiment Video

Updated: Jun 5, 2026

Understanding the Development of Compensatory Pathways in a Mutant Malaria Parasite Harbouring Hypomorphic Allele of Plant-Like Kinases
09:13

Understanding the Development of Compensatory Pathways in a Mutant Malaria Parasite Harbouring Hypomorphic Allele of Plant-Like Kinases

Published on: November 22, 2024

Maternal Phenylketonuria (MPKU).

W E Schoonheyt, W B Hanley, J T Clarke

    Canadian Family Physician Medecin De Famille Canadien
    |January 27, 2011
    PubMed
    Summary
    This summary is machine-generated.

    Maternal phenylketonuria (PKU) can cause severe developmental issues in newborns. Early dietary phenylalanine restriction before and during pregnancy significantly reduces the risk of these congenital anomalies.

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    In Vivo Modeling of the Morbid Human Genome using Danio rerio
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    Understanding the Development of Compensatory Pathways in a Mutant Malaria Parasite Harbouring Hypomorphic Allele of Plant-Like Kinases
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    In Vivo Modeling of the Morbid Human Genome using Danio rerio
    12:31

    In Vivo Modeling of the Morbid Human Genome using Danio rerio

    Published on: August 24, 2013

    Area of Science:

    • Medical Genetics
    • Obstetrics
    • Pediatrics

    Background:

    • Maternal phenylketonuria (MPKU) is a significant teratogenic risk factor.
    • Untreated MPKU leads to severe fetal complications like microcephaly and developmental retardation.

    Purpose of the Study:

    • To highlight the preventable risks associated with untreated maternal PKU.
    • To emphasize the importance of early intervention through dietary management.

    Main Methods:

    • Review of existing evidence on maternal PKU and fetal outcomes.
    • Discussion of dietary phenylalanine restriction as a preventative measure.

    Main Results:

    • Dietary restriction of phenylalanine before and during pregnancy is effective in preventing congenital anomalies.
    • Early detection and management can mitigate severe developmental consequences.

    Conclusions:

    • Maternal PKU is a critical, yet preventable, cause of congenital abnormalities.
    • Prenatal and premarital screening for PKU in women of childbearing age is crucial for future generations.